gistfile1.txt

package com.make;

import java.io.IOException;
import java.util.List;

import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;


public class simpleGoogleMaps extends MapActivity
{
Geocoder geocoder=null;
MapView mapView=null;

@Override
protected boolean isLocationDisplayed(){
return false;
}
@Override
protected boolean isRouteDisplayed(){
return false;
}
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);

setContentView(R.layout.main);
mapView=(MapView)findViewById(R.id.map);
mapView.setBuiltInZoomControls(true);

Button geoBtn=(Button)findViewById(R.id.geocodeBtn);
geocoder=new Geocoder(this);
geoBtn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View srg0){
 
try{
EditText loc=(EditText)findViewById(R.id.location);
String locationName=loc.getText().toString();
List<Address>addressList=geocoder.getFromLocationName(locationName,5);
if(addressList!=null && addressList.size()>0)
{
 int lat=(int)(addressList.get(0).getLatitude()*1000000);
 int lng=(int)(addressList.get(0).getLongitude()*1000000);

GeoPoint pt=new GeoPoint(lat,lng);
mapView.getController().setZoom(15);
mapView.getController().setCenter(pt);
}
}catch(IOException e){
e.printStackTrace();
}
}});
}
}

gistfile2.txt

xml..

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent">
		
<LinearLayout android:layout_width="fill_parent"
android:layout_alignParentBottom="true"
android:layout_height="wrap_content"
android:orientation="vertical">

<EditText android:layout_width="fill_parent" android:id="@+id/location"
android:layout_height="wrap_content"
/>

<Button android:id="@+id/geocodeBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Find"/>
</LinearLayout>

<com.google.android.maps.MapView

android:id="@+id/map" android:clickable="true"
android:layout_width="fill_parent"
android:layout_height="320px"
android:apiKey="0JfVbxbXShKp6h-xycpoR1hw_yawrKng5eUMX0g"/>


</RelativeLayout>

gistfile3.txt

manifest..
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.make"
      android:versionCode="1"
      android:versionName="1.0">
          
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".simpleGoogleMaps"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
      <uses-permission android:name="android.permission.INTERNET" />

</manifest>